My Algebra students struggle with solving word problems. I found that using the acronym RULES really helped them keep things straight. Now that we have established the procedure, this same framework helped us learn inequalities, linear equations, and systems of equations. The steps are:
R- read the problem
U - underline the question
L - line up a plan
E - evaluate
S - sense?
This powerpoint goes through RULES and an example problem featuring a system of equations. It is animated to gradually release steps to students and allow them to follow an example of the procedure.
There is guided notes sheet available in my TpT store (http://www.teacherspayteachers.com/Product/RULES-for-Solving-Systems-of-Equations-Word-Problems-Guided-Notes-Practice-1129920) that follows the powerpoint and has more examples to do as guided practice.